'belle' is the operationg system that I upgraded from the default 'anna' installed in nokia 500. Found a new feature in nokia 500. if u r running out of battery with no charger nearby, press the power button when in standby(when no applications are open) and select "activate power-saving mode". A crescent moon appears on the battery icon(located at the top of screen). When u plug in the charger, the phone asks u if u want to disable the power-saving mode. Cool, ain't it?

updated to belle at nokia priority as soon as i bought it. No lagging so far. No hanging. No resstarts. The corner buttons, though, need half-a-sec longer touch. No GPU, no problems. In fact, it has 2D HW acceleration (http://www.developer.nokia.com/Community/Discus­sion/showthread.php?228381-Nokia-500-graphics-ac­celeration). Don't play 3D games or watch 720p HD videos much. So no issues.
But if u want to use it as a business phone - push-email, SNS, phone (call quality & loud speaker are superb). more later. those interested in buying, put ur Questions, i will answer asap.

croc79, 22 Feb 2012hi! As far as i know, warranty has nothing to do w/ the belle update. The only factor on wheth... morewhen i checked my phone there was only 120mb free,its new mobile so what hapened to the rest 800mb